Correlation between Nutrient Intake and Blood Components of Dairy Cows in Early Lactation Stage

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  • 乳牛の泌乳初期における養分摂取レベルと血液性状の相関
  • ニュウギュウ ノ ヒニュウ ショキ ニ オケル ヨウブン セッシュ レベル ト

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Abstract

Four Holstein cows were examined at primisecundis, and tertiparity. In the early lactation stage up to 10 weeks after calving, an increase in hematocrit (Ht), hemoglobin (Hb), albumin (Alb), and blood urine nitrogen (BUN) was associated with an increase in CP and TDN intake. At the time of low levels of CP and TDN inake, free fatty acid (FFA) inceaseed. It was suggested that Ht, Hb, Alb, BUN and FFA in the blood might be significant items for estimation of the feeding level of a cow in the early lactation stage.

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